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Share-Based Compensation (Details 2)	12 Months Ended
	Dec. 31, 2017
Imaging Cayman [Member] | Stock Options 2012 Plan [Member]
Valuation assumptions:
Expected dividend yield	0.00%
Expected volatility	43.29%
Expected term (years)	3 years 1 month 15 days
Risk-free interest rate	0.87%
Imaging Cayman [Member] | Stock Options 2013 Plan [Member]
Valuation assumptions:
Expected dividend yield	0.00%
Expected volatility	39.50%
Expected term (years)	2 years 1 month 15 days
Risk-free interest rate	0.85%
Imaging Cayman [Member] | Stock Options 2016 Plan [Member]
Valuation assumptions:
Expected dividend yield	0.00%
Expected volatility	38.04%
Expected term (years)	3 years 1 month 15 days
Risk-free interest rate	0.50%
Imaging Taiwan [Member] | Stock Options 2016 Plan [Member]
Valuation assumptions:
Expected dividend yield	0.00%
Expected volatility	38.04%
Expected term (years)	3 years 1 month 15 days
Risk-free interest rate	0.50%
Himax Display [Member] | Stock Options 2015 Plan [Member]
Valuation assumptions:
Expected dividend yield	0.00%
Expected volatility	33.52%
Expected term (years)	3 years 1 month 15 days
Risk-free interest rate	0.65%

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- References

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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